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Well every time I start my truck the rpm's jump around bad some times even die but rarely . And ive been trying to fix it with no luck. Ive tried more timing, spark, start up flash ups i just dont know how to do it so if anyone with tuning experience can help me out that would be great.
http://i261.photobucket.com/albums/i...h_DSCN0699.jpg
Every thing else in my tune is great except the start up. but once it it stops surging the rpm's steady.
is it everytime u start it or just when the motor is cold?
Yes both hot and cold.
do you use hptuners?
if so post up your tune
I use efi live im not sure how many people use efi live but i get a file up.
here an old thread but i haven't changed anything in my tune since then.
ac wont work at idle - EFILive Forum
it's probably too rich on the idle tables. If you have a wideband try to get the idle mixture close to 15:1. When it gets warmed up and in closed loop, that's probably when it starts to run correctly.
ok ill try and barrow my friend wide band, but i do remember the last time i had a wide bad on there i think it was 14.1 or something like that but i will do that still.
oh...idk bout efilive, but in hpt there is an idle air startup table
u prob need to add air to that...it will let the IAC open more to let more air in, heres what it looks like in HPTuners
http://i129.photobucket.com/albums/p...dleAirflow.jpg
Ok ill have some result in a few hour i need to see if the wide band is still good and not burned up. Thanks guys.
Well i got a frankenstain wo2 system and all i got to read was my idle and wot, before it got streched and mess somthing up and got code 2 on the reader. but what im thinking is that my idle is really lean like 18-19. so maybe if i richen it up a little it will help that surge.
So start the truck and let it get up to temp and in closed loop and see what your WB reading is when the truck is idling smoothly, then match it at cold startup in open loop. Surely you can manually put the truck into open loop with the EFI-Live software. Bounce back and forth from open to closed loop adjusting your open loop idle fuel mixture until it runs as smooth as the closed loop mixture.
Ok I will try to do that tomarrow if i can get my wo2 working agian. With reports.
OOO just a thought. Will that work even if the truck is already hot since it does the same thing when worm.
Ok i fixed my problem, i added 2% across the table for after fuel inrichment. now it fires perfect.